Greater Treasure Valley Costume Society (GTVCS) is a non-profit organization made up of people who share an interest in recreational costuming/period dress. Located in Boise area, we offer information on a variety of activities including but not limited to workshops, costume salons, costume events and events that lend themselves to period dress enhancement. On this site you will find information on upcoming activities, pattern reviews, costume resources, photos from past events and much more. Welcome to our world of costuming/period dress. It's all about fun and friendship. We hope you join in!